In AN 9.5, the Buddha said that whoever is endowed with the four powers has left behind the fear of embarrassment in assemblies. Is this the same as shyness? If not then did the Buddha ever say how to overcome shyness?
There are, monks, four powers. The power of wisdom, the power of energy, the power of an unblemished life and the power of benevolence....Now, monks, a noble disciple endowed with these four powers has left behind five fears: the fear for his livelihood, the fear of disrepute, the fear of embarrassment in assemblies, the fear of death and the fear of an unhappy future destiny.